PROBLEM TO BE SOLVED: To enable the two-dimensional evaluation of the environment of a coastal area even by a person free from specialized knowledge. SOLUTION: Two-dimensional survey of a coastal area is carried out by lining a plural number of surveying persons in a row in the coastal area and counting the number of environmental indicator plants and drifted wastes and surveying the geological conditions to enable, in contrast with conventional surveying method, the survey of the environmental change in a coastal area having a complicate shoreline or having an inflow river or a coastal construction. The survey is carried out by preparatorily determining the kind of the organism to be surveyed and counting the number of the organism and, accordingly, it can be performed by persons free from specialized knowledge. The danger of the bioenvironment and geographical environment and the progress of the danger can be analyzed and diagnosed from the distribution map obtained by the mapping of the survey result and the obtained map can be used as an index for the restoration and management of the environment.
